M1 Question - Help needed :) Watch

lekha2611
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Report Thread starter 7 years ago
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Question:

"A particle P is projected with speed 12 ms-1 up a line of greatest slope of a fixed smooth plane inclined at an angle of theta degrees to the horizontal. The speed of P after 2 seconds is 4.8 ms-1. Find, to 2sf, the value of theta. "

I've worked out the acceleration (-3.6 ms-2), but I'm not sure what I'm supposed to do next really - I don't have a mass, force etc. It may involve simultaneous equations, but I'm not sure what equations to use.

Any help would be appreciated - thank you!
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vc94
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Do F=ma parallel to the plane, the mass m cancels.
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